Safety-lock.



F. MORTENSEN.

SAFETY LOCK.

APPLICATION FILED OCT. ll, 19!].

77 2 u i I 0 r 4 8 48 '19 r A I'll/4! I I I A a 6, 11 10.

ATTORNEY mural) STATES PATENT orrion.

.FRANTZ MORTENSEN, or COPENHAGEN, DENMARK.

SAFETY-LOOK.

To all whom it may concern:

Be it known that I, FRANTZ MoRTENsEN, a subject of the King of Denmark, residing at Amagerbrogade 257, Copenhagen, Denmark, have invented certain new and useful Improvements in or Relating to Safety-Locks, of which the following is a specification.

This invention relates to locks of the type in which it has been proposed to use a number of tumbler plates'which may be moved by means of a key which is irregularly formed at the end. I

The object of the invention is to provide a safety lock which will overcome several disadvantages generally present in such locks. 1

According to this invention the improved safety lock has briefly the following advantages p The lock may be operated conveniently and securely from both sides of thedoor; it is practically speaking impossible to open the lock by means of a false key. One single spiral spring acts as returning means in both the directions in which the locking bolt is moved. The tumbler plates move quite independent of each other. One single spring or a springon each side of the tumbler plates will automatically effect locking when the ball is pushed out. When locked,

the bolt cannot be pushed back. The fixing of the lock is convenient, practical and secure. I I

Referring now to the accompanying drawings which show by way of example one form in which the invention may be carried into effect Figure 1 shows the lock in vertical section and in closed position, fixed to the door. Fig. 2 is the same as Fig. l excepting that the locking bolt is shown in opening posi-' tion.

Fig. 3 is the same as Fig. 1 excepting that i the locking bolt is pushed entirely back,

which is the case every time the door is opened and closed. V

Fig. 4 is"a vertical cross-section of the lock on'line {l4c of Fig. 5 showing thekey acting on the tumbler plates. a

Fig. 5 is a horizontal section of the lock on line 55 of Fig. t showing'one of the buttons pushing out the look bolt in order to bring the tumbler plates in locking ordogging position.

Fig. 6 is a horizontal section'along line Specification of LettersjEatent. Patented Aug, 2'7; 1918, 7 Application filed October 11, 1917. Serial No. 196,032.

66 of Fig. twith the tumbler plates moved in; This view also shows the spring which moves the tumbler plates when the locking bolt is pushed out thus bringing the parts into looking position.

Fig. 7 shows one ofthe tumbler plates.

Fig. 8 shows the key.

'In the form shown in the accompanying drawings, the lock consists of a casing 1 having an opening 2 for the lock bolt 3. This bolt has an opening 4: at the rear in which the tumbler plates 5, having either one or two slots 7 at their end, are placed between disks 6. The slots 7 are so arranged that when the key is pushed in, one set of the slots will form a straight line so as to accommodate a stationary fence 8.

The tumbler plates 5 turn on the 'pivot pin 9 in contact with the disks 6 which are prevented frommoving with the plates on the pin.. The spiral-spring 10 may be used for creating friction between the tumbler plates 5 and the disks 6. v

The spring 11 performs a double function. In the rst' place it will react upon the looking b0 '0 3 to press the tumbler plates 5 against the fence 8 as shown in Fig. 1, when the parts are-in the locking position, so that as soon as the slots 7 at the end of the tumbler plates are brought into opening position by means of the key, the tumbler plates will be moved over thefence, as shown in Fig. 2, through the pressure of the spring 11. In the second place when the door is opened or closed and 'thelocking bolt thereby pushed farther back, the spring will'act in the oppositedirection and tend to push the looking boltoutward as shown in Fig. 3.

On each side of thecasing a key-way 12 is arranged for the key 13. The end of the key'has an irregular shape, for instance,as

called ball look, i. 6., when the locking bolt 7 is in the position as shown in Fig. 2 the door may be opened either by pushing or pulling, the locking bolt in either case being pressed farther back (see Fig. 3) due to its engagement with the keeper of the door frame. The-spring 11 will however again bring the bolt when released into neutral position as shown in Fig. 2. Other ways of working the bolt may, however, be used without departing from the spirit of this invention.

The buttons 14 supported upon the springs 15 serve in conjunction with the plunger pins 16 to press out the locking bolt 3 and free the tumblers from engagement with the fence 8 when fastening the lock. By pressing 'a button a conical part 17 will act on the end of the locking bolt and push it outward, thus disengaging the tumbler plates from the fence. As soon as the tumbler plates are disengaged the spring 18 will immediately bring them into locking position. The action of disengaging the tumbler plates may also be arranged in various ways and the spring 18 maybe divided into two springs acting one on each side of the tumbler plates if desired. v

-The lock is fixed to the door in the manner shown in Figs. 1 and 5. The sides 19 of the casing 1 protrude and overlap the opening in the door in which the lock is fixed. By fixing the lock in this way the door need -not be unnecessarily out and the lock, which is fixed to the door only by means of the screws 20, will fit to practically any door without altering the lock or the key.

I11 the drawings, the tumbler plates 5 are:

shown in connection with the movable looking bolt and the fence 8 is stationary, but

this arrangement of the tumbler plates and' the bridge may be reversed without any inconvenience to the function of the lock.

Having now described my invention, what Iclaim as new and desire to secure by Let ters Patent is 1. In combination in a look, a slidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence,'mounted on a pivot pin with intervening spacing disks axially pressable against said tumblers but restrained from angular movement therewith thus -providing for independent movement of any tumbler against frictional resistance sufficient to prevent undesired movement, and a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt.

2. In combination in a look, aslidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence, mounted on a pivot pin with intervening spacing disks axially pressable against said tumblers but restrained from angularmovement therewith thus providing for independent movement of any tumbler against frictional resistance sufficient. to prevent undesired movement, a resilient element for pressing said disks against said tumblers to automatically compensate for wear, and a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt.

3. In combination in a look, a slidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence, mounted and angularly movable upon a pivot pin, in company with intervening non-rotatable and axially adjustable spacing disks, a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt, and a single spring normally retaining said bolt said fence just enters said slots, and permitting, while resiliently opposing, inward or outward movement of said bolt.

4. In combination in a look, a slidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence, mounted and angularly movable upon a pivot pin, in company with intervening non-rotatable and axially adjustable spacing disks, a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt, a single spring normally retaining said bolt in an intermediate latch position wherein said fence just enters said slots, and permitting, while resiliently opposing, inward or outward movement thereof, a resilient push button movable normally of the bolts movement to push it outward and disengage said fence from said slots, and spring means to rock said tumblers about their axes and lock the bolt in the outward position.

5. In combination in a lock, a slidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence, and of which at least one has two slots so placed that one will be moved into line with said fence when said plate is operated, and a push key insertible from either side of the lock to operate said tumbler plates and effect alinement of a row of slots to receive said fence and permit backward movement of said bolt.

6. In combination in a look, a slidable bolt, a fence-like abutment member, a series of tumbler plates slotted to accommodate said fence and of which any number are provided with two slots so placed that one slot will be moved into line with said fence when said plates are operated, and a push said casing behind said bolt, a series of tumbler plates slotted to accommodate said fence, mounted in said bolt on a pivot pin with intervening spacing disks axially pressable against said tumblers but restrained from angular movement therewith thus providing for independent movement of any tumbler against frictional resistance sufiicient to prevent undesired movement, and a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt.

8. In combination in a lock, a bolt slidable in a casing, a fence-like abutment in said casing behind said bolt, a series of tumbler plates slotted to accommodate said fence mounted in said bolt on a pivot pin with intervening spacing disks axially pressable against said tumblers but restrained from angular movement therewith thus providing for independent movement of any tumbler against frictional resistance suflicient to prevent undesired movement, a resilient element for pressing said disks against said tumblers to automaticallycompensate for wear, and a push key adapted to operate said tumblers and efiect alinement of the slots therein to receive said fence and permit backward movement of said bolt.

9. In combination in a look, a bolt slidable in a casing, a fence-like abutment in said casing behind said bolt, a series of tumbler plates slotted to accommodate said fence mounted in said bolt and angularly movable upon a pivot pin, in company with intervening non-rotatable and axially adjustable spacing disks, a push key adapted to operate said tumblers and effect alinement of the slots therein to receive said fence and permit backward movement of said bolt, and a single spring normally retaining said bolt in an intermediate latch position wherein said fence just enters said slots, and permitting, while resiliently opposing, inward or outward movement of said bolt.

10. In combination in a lock, a bolt slidable in a casing, a fence-like abutment in said casing behind said bolt, a series of tumbler plates .slotted to accommodate said fence mounted in said bolt and angularly movable upon a pivot pin, in company with intervening non-rotatable and axially adjustable spacing disks, a push key adapted to operate said tumblers and effect aline ment of the slots therein to receive said fence and permit backward movement of said bolt, a single spring normally retaining said bolt in an intermediate latch position wherein said fence just enters said slots and permitting, while resiliently opposing, inward or outward movement of said .bolt, a resilient push button movable normally of the bolts movement to push it outward and disengage said fence from said slots, and spring means to rock said tumblers about their axes and lock the bolt in the outward position.

11. In combination in a lock, a bolt slidable in a casing, a fence-like abutment in said casing behind said bolt, a series of tumbler plates slotted to accommodate said fence and of which at least one has two slots so placed that one will be moved into line with said fence when said plate is operated, and a push key insertible from either side of the lock to operate said tumbler plates and effect alinement of arow of slots to receive said fence and permit backward movement of said bolt.

12. In combination in a lock, a bolt slidable in a casing, a fence-like abutment in said casing behind said bolt, a series of tumbler plates slotted to accommodate said fence mounted in said bolt and of which any number are provided with two slots so placed that one will be moved into line with said fence when said plates are operated, and a push key insertible from either side of the lock to operate said tumbler plates and effect alinement of a row of slots to receive said fence and permit backward movement of said bolt.

In testimony whereof I have signed my Witnesses:

GUSTAV SoRnNsnN, JALo KORO.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. 0. 

